Pump Alternation Control Applications (Altern) - Bindicator PRD1000 Instruction Manual

PRD1000 Analog Input Process Meter

Pump Alternation Control Applications (Altern)

For pump control applications where two or more similar pumps are
used to control the level of a tank or a well, it is desirable to have all the
pumps operate alternately. This prevents excessive wear and
overheating of one pump over the lack of use of the other pumps.
Up to 2 relays can be set up to alternate every time an on/off pump
cycle is completed. The set points and reset points can be programmed,
so that the first pump on is the first pump off.
Application #1: Pump Alternation Using Relays 1 & 2
Relays 1 and 2 are set up for pump alternation.
Set and Reset Point Programming
Relay Set Point
1 30.000
2 35.000
Pump Alternation Operation
1. Pump #1 turns on when level reaches 30.000, when level drops
below 10.000, pump #1 turns off.
2. The next time level reaches 30.000, pump #2 turns on, when level
drops below 10.000, pump #2 turns off.
3. If the level doesn't reach 35.000, pump #1 and pump #2 will be
operating alternately.
4. If pump #1 cannot keep the level below 35.000, pump #2 will turn
on at 35.000, then as the level drops to10.000, pump #1 turns off,
pump #2 is still running and shuts off below 5.000.
5. Notice that with the set and reset points of pump #2 outside the
range of pump #1, the first pump on is the first pump to go off.
Reset Point
10.000
5.000
58
Instruction Manual
Function
Controls pump #1
Controls pump #2